wpa_supplicant/interworking.c

   1 /*
   2  * Interworking (IEEE 802.11u)
   3  * Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "common/ieee802_11_defs.h"
  13 #include "common/gas.h"
  14 #include "common/wpa_ctrl.h"
  15 #include "utils/pcsc_funcs.h"
  16 #include "utils/eloop.h"
  17 #include "drivers/driver.h"
  18 #include "eap_common/eap_defs.h"
  19 #include "eap_peer/eap.h"
  20 #include "eap_peer/eap_methods.h"
  21 #include "wpa_supplicant_i.h"
  22 #include "config.h"
  23 #include "config_ssid.h"
  24 #include "bss.h"
  25 #include "scan.h"
  26 #include "notify.h"
  27 #include "gas_query.h"
  28 #include "hs20_supplicant.h"
  29 #include "interworking.h"
  30
  31
  32 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
  33 #define INTERWORKING_3GPP
  34 #else
  35 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
  36 #define INTERWORKING_3GPP
  37 #else
  38 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
  39 #define INTERWORKING_3GPP
  40 #endif
  41 #endif
  42 #endif
  43
  44 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  45 static struct wpa_cred * interworking_credentials_available_realm(
  46         struct wpa_supplicant *wpa_s, struct wpa_bss *bss);
  47 static struct wpa_cred * interworking_credentials_available_3gpp(
  48         struct wpa_supplicant *wpa_s, struct wpa_bss *bss);
  49
  50
  51 static void interworking_reconnect(struct wpa_supplicant *wpa_s)
  52 {
  53         if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
  54                 wpa_supplicant_cancel_sched_scan(wpa_s);
  55                 wpa_supplicant_deauthenticate(wpa_s,
  56                                               WLAN_REASON_DEAUTH_LEAVING);
  57         }
  58         wpa_s->disconnected = 0;
  59         wpa_s->reassociate = 1;
  60
  61         if (wpa_supplicant_fast_associate(wpa_s) >= 0)
  62                 return;
  63
  64         wpa_supplicant_req_scan(wpa_s, 0, 0);
  65 }
  66
  67
  68 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  69                                       struct wpabuf *extra)
  70 {
  71         struct wpabuf *buf;
  72         size_t i;
  73         u8 *len_pos;
  74
  75         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
  76                                          (extra ? wpabuf_len(extra) : 0));
  77         if (buf == NULL)
  78                 return NULL;
  79
  80         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
  81         for (i = 0; i < num_ids; i++)
  82                 wpabuf_put_le16(buf, info_ids[i]);
  83         gas_anqp_set_element_len(buf, len_pos);
  84         if (extra)
  85                 wpabuf_put_buf(buf, extra);
  86
  87         gas_anqp_set_len(buf);
  88
  89         return buf;
  90 }
  91
  92
  93 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
  94                                       u8 dialog_token,
  95                                       enum gas_query_result result,
  96                                       const struct wpabuf *adv_proto,
  97                                       const struct wpabuf *resp,
  98                                       u16 status_code)
  99 {
 100         struct wpa_supplicant *wpa_s = ctx;
 101
 102         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
 103                      status_code);
 104         interworking_next_anqp_fetch(wpa_s);
 105 }
 106
 107
 108 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
 109 {
 110         struct wpa_cred *cred;
 111
 112         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 113                 if (cred->roaming_consortium_len)
 114                         return 1;
 115         }
 116         return 0;
 117 }
 118
 119
 120 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
 121 {
 122         struct wpa_cred *cred;
 123
 124         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 125                 if (cred->pcsc || cred->imsi)
 126                         return 1;
 127         }
 128         return 0;
 129 }
 130
 131
 132 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
 133 {
 134         struct wpa_cred *cred;
 135
 136         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 137                 if (cred->pcsc || cred->imsi)
 138                         continue;
 139                 if (!cred->eap_method)
 140                         return 1;
 141                 if (cred->realm && cred->roaming_consortium_len == 0)
 142                         return 1;
 143         }
 144         return 0;
 145 }
 146
 147
 148 static int cred_with_domain(struct wpa_supplicant *wpa_s)
 149 {
 150         struct wpa_cred *cred;
 151
 152         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 153                 if (cred->domain || cred->pcsc || cred->imsi)
 154                         return 1;
 155         }
 156         return 0;
 157 }
 158
 159
 160 static int additional_roaming_consortiums(struct wpa_bss *bss)
 161 {
 162         const u8 *ie;
 163         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 164         if (ie == NULL || ie[1] == 0)
 165                 return 0;
 166         return ie[2]; /* Number of ANQP OIs */
 167 }
 168
 169
 170 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
 171 {
 172         struct wpa_supplicant *wpa_s = eloop_ctx;
 173         interworking_next_anqp_fetch(wpa_s);
 174 }
 175
 176
 177 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
 178                                       struct wpa_bss *bss)
 179 {
 180         struct wpabuf *buf;
 181         int ret = 0;
 182         int res;
 183         u16 info_ids[8];
 184         size_t num_info_ids = 0;
 185         struct wpabuf *extra = NULL;
 186         int all = wpa_s->fetch_all_anqp;
 187
 188         wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 189                    MAC2STR(bss->bssid));
 190         wpa_s->interworking_gas_bss = bss;
 191
 192         info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
 193         if (all) {
 194                 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
 195                 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
 196         }
 197         if (all || (cred_with_roaming_consortium(wpa_s) &&
 198                     additional_roaming_consortiums(bss)))
 199                 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
 200         if (all)
 201                 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
 202         if (all || cred_with_nai_realm(wpa_s))
 203                 info_ids[num_info_ids++] = ANQP_NAI_REALM;
 204         if (all || cred_with_3gpp(wpa_s))
 205                 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
 206         if (all || cred_with_domain(wpa_s))
 207                 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
 208         wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
 209                     (u8 *) info_ids, num_info_ids * 2);
 210
 211 #ifdef CONFIG_HS20
 212         if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
 213                 u8 *len_pos;
 214
 215                 extra = wpabuf_alloc(100);
 216                 if (!extra)
 217                         return -1;
 218
 219                 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
 220                 wpabuf_put_be24(extra, OUI_WFA);
 221                 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
 222                 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
 223                 wpabuf_put_u8(extra, 0); /* Reserved */
 224                 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
 225                 if (all) {
 226                         wpabuf_put_u8(extra,
 227                                       HS20_STYPE_OPERATOR_FRIENDLY_NAME);
 228                         wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
 229                         wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
 230                         wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
 231                 }
 232                 gas_anqp_set_element_len(extra, len_pos);
 233         }
 234 #endif /* CONFIG_HS20 */
 235
 236         buf = anqp_build_req(info_ids, num_info_ids, extra);
 237         wpabuf_free(extra);
 238         if (buf == NULL)
 239                 return -1;
 240
 241         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 242                             interworking_anqp_resp_cb, wpa_s);
 243         if (res < 0) {
 244                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 245                 ret = -1;
 246                 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
 247                                        NULL);
 248         } else
 249                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 250                            "%u", res);
 251
 252         wpabuf_free(buf);
 253         return ret;
 254 }
 255
 256
 257 struct nai_realm_eap {
 258         u8 method;
 259         u8 inner_method;
 260         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 261         u8 cred_type;
 262         u8 tunneled_cred_type;
 263 };
 264
 265 struct nai_realm {
 266         u8 encoding;
 267         char *realm;
 268         u8 eap_count;
 269         struct nai_realm_eap *eap;
 270 };
 271
 272
 273 static void nai_realm_free(struct nai_realm *realms, u16 count)
 274 {
 275         u16 i;
 276
 277         if (realms == NULL)
 278                 return;
 279         for (i = 0; i < count; i++) {
 280                 os_free(realms[i].eap);
 281                 os_free(realms[i].realm);
 282         }
 283         os_free(realms);
 284 }
 285
 286
 287 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 288                                       const u8 *end)
 289 {
 290         u8 elen, auth_count, a;
 291         const u8 *e_end;
 292
 293         if (pos + 3 > end) {
 294                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 295                 return NULL;
 296         }
 297
 298         elen = *pos++;
 299         if (pos + elen > end || elen < 2) {
 300                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 301                 return NULL;
 302         }
 303         e_end = pos + elen;
 304         e->method = *pos++;
 305         auth_count = *pos++;
 306         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 307                    elen, e->method, auth_count);
 308
 309         for (a = 0; a < auth_count; a++) {
 310                 u8 id, len;
 311
 312                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 313                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 314                                    "Parameter subfield");
 315                         return NULL;
 316                 }
 317
 318                 id = *pos++;
 319                 len = *pos++;
 320
 321                 switch (id) {
 322                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 323                         if (len < 1)
 324                                 break;
 325                         e->inner_non_eap = *pos;
 326                         if (e->method != EAP_TYPE_TTLS)
 327                                 break;
 328                         switch (*pos) {
 329                         case NAI_REALM_INNER_NON_EAP_PAP:
 330                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 331                                 break;
 332                         case NAI_REALM_INNER_NON_EAP_CHAP:
 333                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 334                                 break;
 335                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 336                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 337                                 break;
 338                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 339                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 340                                 break;
 341                         }
 342                         break;
 343                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 344                         if (len < 1)
 345                                 break;
 346                         e->inner_method = *pos;
 347                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 348                                    e->inner_method);
 349                         break;
 350                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 351                         if (len < 1)
 352                                 break;
 353                         e->cred_type = *pos;
 354                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 355                                    e->cred_type);
 356                         break;
 357                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 358                         if (len < 1)
 359                                 break;
 360                         e->tunneled_cred_type = *pos;
 361                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 362                                    "Type: %u", e->tunneled_cred_type);
 363                         break;
 364                 default:
 365                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 366                                    "Parameter: id=%u len=%u", id, len);
 367                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 368                                     "Value", pos, len);
 369                         break;
 370                 }
 371
 372                 pos += len;
 373         }
 374
 375         return e_end;
 376 }
 377
 378
 379 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 380                                         const u8 *end)
 381 {
 382         u16 len;
 383         const u8 *f_end;
 384         u8 realm_len, e;
 385
 386         if (end - pos < 4) {
 387                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 388                            "fixed fields");
 389                 return NULL;
 390         }
 391
 392         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 393         pos += 2;
 394         if (pos + len > end || len < 3) {
 395                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 396                            "(len=%u; left=%u)",
 397                            len, (unsigned int) (end - pos));
 398                 return NULL;
 399         }
 400         f_end = pos + len;
 401
 402         r->encoding = *pos++;
 403         realm_len = *pos++;
 404         if (pos + realm_len > f_end) {
 405                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 406                            "(len=%u; left=%u)",
 407                            realm_len, (unsigned int) (f_end - pos));
 408                 return NULL;
 409         }
 410         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 411         r->realm = dup_binstr(pos, realm_len);
 412         if (r->realm == NULL)
 413                 return NULL;
 414         pos += realm_len;
 415
 416         if (pos + 1 > f_end) {
 417                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 418                 return NULL;
 419         }
 420         r->eap_count = *pos++;
 421         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 422         if (pos + r->eap_count * 3 > f_end) {
 423                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 424                 return NULL;
 425         }
 426         r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
 427         if (r->eap == NULL)
 428                 return NULL;
 429
 430         for (e = 0; e < r->eap_count; e++) {
 431                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 432                 if (pos == NULL)
 433                         return NULL;
 434         }
 435
 436         return f_end;
 437 }
 438
 439
 440 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 441 {
 442         struct nai_realm *realm;
 443         const u8 *pos, *end;
 444         u16 i, num;
 445
 446         if (anqp == NULL || wpabuf_len(anqp) < 2)
 447                 return NULL;
 448
 449         pos = wpabuf_head_u8(anqp);
 450         end = pos + wpabuf_len(anqp);
 451         num = WPA_GET_LE16(pos);
 452         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 453         pos += 2;
 454
 455         if (num * 5 > end - pos) {
 456                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 457                            "enough data (%u octets) for that many realms",
 458                            num, (unsigned int) (end - pos));
 459                 return NULL;
 460         }
 461
 462         realm = os_calloc(num, sizeof(struct nai_realm));
 463         if (realm == NULL)
 464                 return NULL;
 465
 466         for (i = 0; i < num; i++) {
 467                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 468                 if (pos == NULL) {
 469                         nai_realm_free(realm, num);
 470                         return NULL;
 471                 }
 472         }
 473
 474         *count = num;
 475         return realm;
 476 }
 477
 478
 479 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 480 {
 481         char *tmp, *pos, *end;
 482         int match = 0;
 483
 484         if (realm->realm == NULL || home_realm == NULL)
 485                 return 0;
 486
 487         if (os_strchr(realm->realm, ';') == NULL)
 488                 return os_strcasecmp(realm->realm, home_realm) == 0;
 489
 490         tmp = os_strdup(realm->realm);
 491         if (tmp == NULL)
 492                 return 0;
 493
 494         pos = tmp;
 495         while (*pos) {
 496                 end = os_strchr(pos, ';');
 497                 if (end)
 498                         *end = '\0';
 499                 if (os_strcasecmp(pos, home_realm) == 0) {
 500                         match = 1;
 501                         break;
 502                 }
 503                 if (end == NULL)
 504                         break;
 505                 pos = end + 1;
 506         }
 507
 508         os_free(tmp);
 509
 510         return match;
 511 }
 512
 513
 514 static int nai_realm_cred_username(struct nai_realm_eap *eap)
 515 {
 516         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 517                 return 0; /* method not supported */
 518
 519         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP) {
 520                 /* Only tunneled methods with username/password supported */
 521                 return 0;
 522         }
 523
 524         if (eap->method == EAP_TYPE_PEAP) {
 525                 if (eap->inner_method &&
 526                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 527                         return 0;
 528                 if (!eap->inner_method &&
 529                     eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL)
 530                         return 0;
 531         }
 532
 533         if (eap->method == EAP_TYPE_TTLS) {
 534                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 535                         return 1; /* Assume TTLS/MSCHAPv2 is used */
 536                 if (eap->inner_method &&
 537                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 538                         return 0;
 539                 if (eap->inner_non_eap &&
 540                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 541                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 542                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 543                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
 544                         return 0;
 545         }
 546
 547         if (eap->inner_method &&
 548             eap->inner_method != EAP_TYPE_GTC &&
 549             eap->inner_method != EAP_TYPE_MSCHAPV2)
 550                 return 0;
 551
 552         return 1;
 553 }
 554
 555
 556 static int nai_realm_cred_cert(struct nai_realm_eap *eap)
 557 {
 558         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 559                 return 0; /* method not supported */
 560
 561         if (eap->method != EAP_TYPE_TLS) {
 562                 /* Only EAP-TLS supported for credential authentication */
 563                 return 0;
 564         }
 565
 566         return 1;
 567 }
 568
 569
 570 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
 571                                                  struct nai_realm *realm)
 572 {
 573         u8 e;
 574
 575         if (cred == NULL ||
 576             cred->username == NULL ||
 577             cred->username[0] == '\0' ||
 578             ((cred->password == NULL ||
 579               cred->password[0] == '\0') &&
 580              (cred->private_key == NULL ||
 581               cred->private_key[0] == '\0')))
 582                 return NULL;
 583
 584         for (e = 0; e < realm->eap_count; e++) {
 585                 struct nai_realm_eap *eap = &realm->eap[e];
 586                 if (cred->password && cred->password[0] &&
 587                     nai_realm_cred_username(eap))
 588                         return eap;
 589                 if (cred->private_key && cred->private_key[0] &&
 590                     nai_realm_cred_cert(eap))
 591                         return eap;
 592         }
 593
 594         return NULL;
 595 }
 596
 597
 598 #ifdef INTERWORKING_3GPP
 599
 600 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 601 {
 602         u8 plmn[3], plmn2[3];
 603         const u8 *pos, *end;
 604         u8 udhl;
 605
 606         /*
 607          * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
 608          * operator is allowed to include only two digits of the MNC, so allow
 609          * matches based on both two and three digit MNC assumptions. Since some
 610          * SIM/USIM cards may not expose MNC length conveniently, we may be
 611          * provided the default MNC length 3 here and as such, checking with MNC
 612          * length 2 is justifiable even though 3GPP TS 24.234 does not mention
 613          * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
 614          * with otherwise matching values would not be good idea in general, so
 615          * this should not result in selecting incorrect networks.
 616          */
 617         /* Match with 3 digit MNC */
 618         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 619         plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
 620         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 621         /* Match with 2 digit MNC */
 622         plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 623         plmn2[1] = (imsi[2] - '0') | 0xf0;
 624         plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 625
 626         if (anqp == NULL)
 627                 return 0;
 628         pos = wpabuf_head_u8(anqp);
 629         end = pos + wpabuf_len(anqp);
 630         if (pos + 2 > end)
 631                 return 0;
 632         if (*pos != 0) {
 633                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 634                 return 0;
 635         }
 636         pos++;
 637         udhl = *pos++;
 638         if (pos + udhl > end) {
 639                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 640                 return 0;
 641         }
 642         end = pos + udhl;
 643
 644         wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
 645                    plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
 646                    imsi, mnc_len);
 647
 648         while (pos + 2 <= end) {
 649                 u8 iei, len;
 650                 const u8 *l_end;
 651                 iei = *pos++;
 652                 len = *pos++ & 0x7f;
 653                 if (pos + len > end)
 654                         break;
 655                 l_end = pos + len;
 656
 657                 if (iei == 0 && len > 0) {
 658                         /* PLMN List */
 659                         u8 num, i;
 660                         wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
 661                                     pos, len);
 662                         num = *pos++;
 663                         for (i = 0; i < num; i++) {
 664                                 if (pos + 3 > l_end)
 665                                         break;
 666                                 if (os_memcmp(pos, plmn, 3) == 0 ||
 667                                     os_memcmp(pos, plmn2, 3) == 0)
 668                                         return 1; /* Found matching PLMN */
 669                                 pos += 3;
 670                         }
 671                 } else {
 672                         wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
 673                                     pos, len);
 674                 }
 675
 676                 pos = l_end;
 677         }
 678
 679         return 0;
 680 }
 681
 682
 683 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 684                           size_t mnc_len, char prefix)
 685 {
 686         const char *sep, *msin;
 687         char *end, *pos;
 688         size_t msin_len, plmn_len;
 689
 690         /*
 691          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 692          * Root NAI:
 693          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 694          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 695          */
 696
 697         if (imsi == NULL || os_strlen(imsi) > 16) {
 698                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 699                 return -1;
 700         }
 701         sep = os_strchr(imsi, '-');
 702         if (sep) {
 703                 plmn_len = sep - imsi;
 704                 msin = sep + 1;
 705         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 706                 plmn_len = 3 + mnc_len;
 707                 msin = imsi + plmn_len;
 708         } else
 709                 return -1;
 710         if (plmn_len != 5 && plmn_len != 6)
 711                 return -1;
 712         msin_len = os_strlen(msin);
 713
 714         pos = nai;
 715         end = nai + nai_len;
 716         if (prefix)
 717                 *pos++ = prefix;
 718         os_memcpy(pos, imsi, plmn_len);
 719         pos += plmn_len;
 720         os_memcpy(pos, msin, msin_len);
 721         pos += msin_len;
 722         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 723         if (plmn_len == 5) {
 724                 *pos++ = '0';
 725                 *pos++ = imsi[3];
 726                 *pos++ = imsi[4];
 727         } else {
 728                 *pos++ = imsi[3];
 729                 *pos++ = imsi[4];
 730                 *pos++ = imsi[5];
 731         }
 732         pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 733                            imsi[0], imsi[1], imsi[2]);
 734
 735         return 0;
 736 }
 737
 738
 739 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 740 {
 741         char nai[100];
 742         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 743                 return -1;
 744         return wpa_config_set_quoted(ssid, "identity", nai);
 745 }
 746
 747 #endif /* INTERWORKING_3GPP */
 748
 749
 750 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
 751                                         struct wpa_ssid *ssid)
 752 {
 753         if (wpa_config_set(ssid, "key_mgmt",
 754                            wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 755                            "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP", 0) < 0)
 756                 return -1;
 757         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 758                 return -1;
 759         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 760                 return -1;
 761         return 0;
 762 }
 763
 764
 765 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 766                                      struct wpa_cred *cred,
 767                                      struct wpa_bss *bss)
 768 {
 769 #ifdef INTERWORKING_3GPP
 770         struct wpa_ssid *ssid;
 771         const u8 *ie;
 772         int eap_type;
 773         int res;
 774         char prefix;
 775
 776         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 777                 return -1;
 778
 779         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 780         if (ie == NULL)
 781                 return -1;
 782         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 783                    MAC2STR(bss->bssid));
 784
 785         ssid = wpa_config_add_network(wpa_s->conf);
 786         if (ssid == NULL)
 787                 return -1;
 788         ssid->parent_cred = cred;
 789
 790         wpas_notify_network_added(wpa_s, ssid);
 791         wpa_config_set_network_defaults(ssid);
 792         ssid->priority = cred->priority;
 793         ssid->temporary = 1;
 794         ssid->ssid = os_zalloc(ie[1] + 1);
 795         if (ssid->ssid == NULL)
 796                 goto fail;
 797         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 798         ssid->ssid_len = ie[1];
 799
 800         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
 801                 goto fail;
 802
 803         eap_type = EAP_TYPE_SIM;
 804         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
 805                 eap_type = EAP_TYPE_AKA;
 806         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
 807                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
 808                     cred->eap_method[0].method == EAP_TYPE_AKA ||
 809                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
 810                         eap_type = cred->eap_method[0].method;
 811         }
 812
 813         switch (eap_type) {
 814         case EAP_TYPE_SIM:
 815                 prefix = '1';
 816                 res = wpa_config_set(ssid, "eap", "SIM", 0);
 817                 break;
 818         case EAP_TYPE_AKA:
 819                 prefix = '0';
 820                 res = wpa_config_set(ssid, "eap", "AKA", 0);
 821                 break;
 822         case EAP_TYPE_AKA_PRIME:
 823                 prefix = '6';
 824                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
 825                 break;
 826         default:
 827                 res = -1;
 828                 break;
 829         }
 830         if (res < 0) {
 831                 wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported",
 832                            eap_type);
 833                 goto fail;
 834         }
 835
 836         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
 837                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
 838                 goto fail;
 839         }
 840
 841         if (cred->milenage && cred->milenage[0]) {
 842                 if (wpa_config_set_quoted(ssid, "password",
 843                                           cred->milenage) < 0)
 844                         goto fail;
 845         } else if (cred->pcsc) {
 846                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
 847                         goto fail;
 848                 if (wpa_s->conf->pcsc_pin &&
 849                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
 850                     < 0)
 851                         goto fail;
 852         }
 853
 854         if (cred->password && cred->password[0] &&
 855             wpa_config_set_quoted(ssid, "password", cred->password) < 0)
 856                 goto fail;
 857
 858         wpa_config_update_prio_list(wpa_s->conf);
 859         interworking_reconnect(wpa_s);
 860
 861         return 0;
 862
 863 fail:
 864         wpas_notify_network_removed(wpa_s, ssid);
 865         wpa_config_remove_network(wpa_s->conf, ssid->id);
 866 #endif /* INTERWORKING_3GPP */
 867         return -1;
 868 }
 869
 870
 871 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
 872                                             size_t rc_len)
 873 {
 874         const u8 *pos, *end;
 875         u8 lens;
 876
 877         if (ie == NULL)
 878                 return 0;
 879
 880         pos = ie + 2;
 881         end = ie + 2 + ie[1];
 882
 883         /* Roaming Consortium element:
 884          * Number of ANQP OIs
 885          * OI #1 and #2 lengths
 886          * OI #1, [OI #2], [OI #3]
 887          */
 888
 889         if (pos + 2 > end)
 890                 return 0;
 891
 892         pos++; /* skip Number of ANQP OIs */
 893         lens = *pos++;
 894         if (pos + (lens & 0x0f) + (lens >> 4) > end)
 895                 return 0;
 896
 897         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 898                 return 1;
 899         pos += lens & 0x0f;
 900
 901         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 902                 return 1;
 903         pos += lens >> 4;
 904
 905         if (pos < end && (size_t) (end - pos) == rc_len &&
 906             os_memcmp(pos, rc_id, rc_len) == 0)
 907                 return 1;
 908
 909         return 0;
 910 }
 911
 912
 913 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
 914                                          const u8 *rc_id, size_t rc_len)
 915 {
 916         const u8 *pos, *end;
 917         u8 len;
 918
 919         if (anqp == NULL)
 920                 return 0;
 921
 922         pos = wpabuf_head(anqp);
 923         end = pos + wpabuf_len(anqp);
 924
 925         /* Set of <OI Length, OI> duples */
 926         while (pos < end) {
 927                 len = *pos++;
 928                 if (pos + len > end)
 929                         break;
 930                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 931                         return 1;
 932                 pos += len;
 933         }
 934
 935         return 0;
 936 }
 937
 938
 939 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
 940                                     const u8 *rc_id, size_t rc_len)
 941 {
 942         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
 943                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
 944 }
 945
 946
 947 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
 948 {
 949         size_t i;
 950
 951         if (!cred->excluded_ssid)
 952                 return 0;
 953
 954         for (i = 0; i < cred->num_excluded_ssid; i++) {
 955                 struct excluded_ssid *e = &cred->excluded_ssid[i];
 956                 if (bss->ssid_len == e->ssid_len &&
 957                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
 958                         return 1;
 959         }
 960
 961         return 0;
 962 }
 963
 964
 965 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
 966         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 967 {
 968         struct wpa_cred *cred, *selected = NULL;
 969         const u8 *ie;
 970
 971         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 972
 973         if (ie == NULL &&
 974             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
 975                 return NULL;
 976
 977         if (wpa_s->conf->cred == NULL)
 978                 return NULL;
 979
 980         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 981                 if (cred->roaming_consortium_len == 0)
 982                         continue;
 983
 984                 if (!roaming_consortium_match(ie,
 985                                               bss->anqp ?
 986                                               bss->anqp->roaming_consortium :
 987                                               NULL,
 988                                               cred->roaming_consortium,
 989                                               cred->roaming_consortium_len))
 990                         continue;
 991
 992                 if (cred_excluded_ssid(cred, bss))
 993                         continue;
 994
 995                 if (selected == NULL ||
 996                     selected->priority < cred->priority)
 997                         selected = cred;
 998         }
 999
1000         return selected;
1001 }
1002
1003
1004 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1005                                        struct wpa_cred *cred, int ttls)
1006 {
1007         if (cred->eap_method) {
1008                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1009                         cred->eap_method->method == EAP_TYPE_TTLS;
1010
1011                 os_free(ssid->eap.eap_methods);
1012                 ssid->eap.eap_methods =
1013                         os_malloc(sizeof(struct eap_method_type) * 2);
1014                 if (ssid->eap.eap_methods == NULL)
1015                         return -1;
1016                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1017                           sizeof(*cred->eap_method));
1018                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1019                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1020         }
1021
1022         if (ttls && cred->username && cred->username[0]) {
1023                 const char *pos;
1024                 char *anon;
1025                 /* Use anonymous NAI in Phase 1 */
1026                 pos = os_strchr(cred->username, '@');
1027                 if (pos) {
1028                         size_t buflen = 9 + os_strlen(pos) + 1;
1029                         anon = os_malloc(buflen);
1030                         if (anon == NULL)
1031                                 return -1;
1032                         os_snprintf(anon, buflen, "anonymous%s", pos);
1033                 } else if (cred->realm) {
1034                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1035                         anon = os_malloc(buflen);
1036                         if (anon == NULL)
1037                                 return -1;
1038                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1039                 } else {
1040                         anon = os_strdup("anonymous");
1041                         if (anon == NULL)
1042                                 return -1;
1043                 }
1044                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1045                     0) {
1046                         os_free(anon);
1047                         return -1;
1048                 }
1049                 os_free(anon);
1050         }
1051
1052         if (cred->username && cred->username[0] &&
1053             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1054                 return -1;
1055
1056         if (cred->password && cred->password[0]) {
1057                 if (cred->ext_password &&
1058                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1059                         return -1;
1060                 if (!cred->ext_password &&
1061                     wpa_config_set_quoted(ssid, "password", cred->password) <
1062                     0)
1063                         return -1;
1064         }
1065
1066         if (cred->client_cert && cred->client_cert[0] &&
1067             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1068                 return -1;
1069
1070 #ifdef ANDROID
1071         if (cred->private_key &&
1072             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1073                 /* Use OpenSSL engine configuration for Android keystore */
1074                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1075                     wpa_config_set_quoted(ssid, "key_id",
1076                                           cred->private_key + 11) < 0 ||
1077                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1078                         return -1;
1079         } else
1080 #endif /* ANDROID */
1081         if (cred->private_key && cred->private_key[0] &&
1082             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1083                 return -1;
1084
1085         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1086             wpa_config_set_quoted(ssid, "private_key_passwd",
1087                                   cred->private_key_passwd) < 0)
1088                 return -1;
1089
1090         if (cred->phase1) {
1091                 os_free(ssid->eap.phase1);
1092                 ssid->eap.phase1 = os_strdup(cred->phase1);
1093         }
1094         if (cred->phase2) {
1095                 os_free(ssid->eap.phase2);
1096                 ssid->eap.phase2 = os_strdup(cred->phase2);
1097         }
1098
1099         if (cred->ca_cert && cred->ca_cert[0] &&
1100             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1101                 return -1;
1102
1103         return 0;
1104 }
1105
1106
1107 static int interworking_connect_roaming_consortium(
1108         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1109         struct wpa_bss *bss, const u8 *ssid_ie)
1110 {
1111         struct wpa_ssid *ssid;
1112
1113         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1114                    "roaming consortium match", MAC2STR(bss->bssid));
1115
1116         ssid = wpa_config_add_network(wpa_s->conf);
1117         if (ssid == NULL)
1118                 return -1;
1119         ssid->parent_cred = cred;
1120         wpas_notify_network_added(wpa_s, ssid);
1121         wpa_config_set_network_defaults(ssid);
1122         ssid->priority = cred->priority;
1123         ssid->temporary = 1;
1124         ssid->ssid = os_zalloc(ssid_ie[1] + 1);
1125         if (ssid->ssid == NULL)
1126                 goto fail;
1127         os_memcpy(ssid->ssid, ssid_ie + 2, ssid_ie[1]);
1128         ssid->ssid_len = ssid_ie[1];
1129
1130         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1131                 goto fail;
1132
1133         if (cred->eap_method == NULL) {
1134                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1135                            "credential using roaming consortium");
1136                 goto fail;
1137         }
1138
1139         if (interworking_set_eap_params(
1140                     ssid, cred,
1141                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1142                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1143                 goto fail;
1144
1145         wpa_config_update_prio_list(wpa_s->conf);
1146         interworking_reconnect(wpa_s);
1147
1148         return 0;
1149
1150 fail:
1151         wpas_notify_network_removed(wpa_s, ssid);
1152         wpa_config_remove_network(wpa_s->conf, ssid->id);
1153         return -1;
1154 }
1155
1156
1157 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1158 {
1159         struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1160         struct wpa_ssid *ssid;
1161         struct nai_realm *realm;
1162         struct nai_realm_eap *eap = NULL;
1163         u16 count, i;
1164         char buf[100];
1165         const u8 *ie;
1166
1167         if (wpa_s->conf->cred == NULL || bss == NULL)
1168                 return -1;
1169         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
1170         if (ie == NULL || ie[1] == 0) {
1171                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
1172                            MACSTR, MAC2STR(bss->bssid));
1173                 return -1;
1174         }
1175
1176         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1177                 /*
1178                  * We currently support only HS 2.0 networks and those are
1179                  * required to use WPA2-Enterprise.
1180                  */
1181                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1182                            "RSN");
1183                 return -1;
1184         }
1185
1186         cred_rc = interworking_credentials_available_roaming_consortium(wpa_s,
1187                                                                         bss);
1188         if (cred_rc) {
1189                 wpa_printf(MSG_DEBUG, "Interworking: Highest roaming "
1190                            "consortium matching credential priority %d",
1191                            cred_rc->priority);
1192         }
1193
1194         cred = interworking_credentials_available_realm(wpa_s, bss);
1195         if (cred) {
1196                 wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm list "
1197                            "matching credential priority %d",
1198                            cred->priority);
1199         }
1200
1201         cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss);
1202         if (cred_3gpp) {
1203                 wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP matching "
1204                            "credential priority %d", cred_3gpp->priority);
1205         }
1206
1207         if (cred_rc &&
1208             (cred == NULL || cred_rc->priority >= cred->priority) &&
1209             (cred_3gpp == NULL || cred_rc->priority >= cred_3gpp->priority))
1210                 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1211                                                                bss, ie);
1212
1213         if (cred_3gpp &&
1214             (cred == NULL || cred_3gpp->priority >= cred->priority)) {
1215                 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss);
1216         }
1217
1218         if (cred == NULL) {
1219                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1220                            "found for " MACSTR, MAC2STR(bss->bssid));
1221                 return -1;
1222         }
1223
1224         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1225                                 &count);
1226         if (realm == NULL) {
1227                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1228                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1229                 return -1;
1230         }
1231
1232         for (i = 0; i < count; i++) {
1233                 if (!nai_realm_match(&realm[i], cred->realm))
1234                         continue;
1235                 eap = nai_realm_find_eap(cred, &realm[i]);
1236                 if (eap)
1237                         break;
1238         }
1239
1240         if (!eap) {
1241                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1242                            "and EAP method found for " MACSTR,
1243                            MAC2STR(bss->bssid));
1244                 nai_realm_free(realm, count);
1245                 return -1;
1246         }
1247
1248         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1249                    MAC2STR(bss->bssid));
1250
1251         ssid = wpa_config_add_network(wpa_s->conf);
1252         if (ssid == NULL) {
1253                 nai_realm_free(realm, count);
1254                 return -1;
1255         }
1256         ssid->parent_cred = cred;
1257         wpas_notify_network_added(wpa_s, ssid);
1258         wpa_config_set_network_defaults(ssid);
1259         ssid->priority = cred->priority;
1260         ssid->temporary = 1;
1261         ssid->ssid = os_zalloc(ie[1] + 1);
1262         if (ssid->ssid == NULL)
1263                 goto fail;
1264         os_memcpy(ssid->ssid, ie + 2, ie[1]);
1265         ssid->ssid_len = ie[1];
1266
1267         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1268                 goto fail;
1269
1270         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1271                                                      eap->method), 0) < 0)
1272                 goto fail;
1273
1274         switch (eap->method) {
1275         case EAP_TYPE_TTLS:
1276                 if (eap->inner_method) {
1277                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1278                                     eap_get_name(EAP_VENDOR_IETF,
1279                                                  eap->inner_method));
1280                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1281                                 goto fail;
1282                         break;
1283                 }
1284                 switch (eap->inner_non_eap) {
1285                 case NAI_REALM_INNER_NON_EAP_PAP:
1286                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1287                             0)
1288                                 goto fail;
1289                         break;
1290                 case NAI_REALM_INNER_NON_EAP_CHAP:
1291                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1292                             < 0)
1293                                 goto fail;
1294                         break;
1295                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1296                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1297                                            0) < 0)
1298                                 goto fail;
1299                         break;
1300                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1301                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1302                                            0) < 0)
1303                                 goto fail;
1304                         break;
1305                 default:
1306                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1307                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1308                                            0) < 0)
1309                                 goto fail;
1310                         break;
1311                 }
1312                 break;
1313         case EAP_TYPE_PEAP:
1314                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1315                             eap_get_name(EAP_VENDOR_IETF,
1316                                          eap->inner_method ?
1317                                          eap->inner_method :
1318                                          EAP_TYPE_MSCHAPV2));
1319                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1320                         goto fail;
1321                 break;
1322         case EAP_TYPE_TLS:
1323                 break;
1324         }
1325
1326         if (interworking_set_eap_params(ssid, cred,
1327                                         eap->method == EAP_TYPE_TTLS) < 0)
1328                 goto fail;
1329
1330         nai_realm_free(realm, count);
1331
1332         wpa_config_update_prio_list(wpa_s->conf);
1333         interworking_reconnect(wpa_s);
1334
1335         return 0;
1336
1337 fail:
1338         wpas_notify_network_removed(wpa_s, ssid);
1339         wpa_config_remove_network(wpa_s->conf, ssid->id);
1340         nai_realm_free(realm, count);
1341         return -1;
1342 }
1343
1344
1345 static struct wpa_cred * interworking_credentials_available_3gpp(
1346         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1347 {
1348         struct wpa_cred *selected = NULL;
1349 #ifdef INTERWORKING_3GPP
1350         struct wpa_cred *cred;
1351         int ret;
1352
1353         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1354                 return NULL;
1355
1356         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1357                 char *sep;
1358                 const char *imsi;
1359                 int mnc_len;
1360                 char imsi_buf[16];
1361                 size_t msin_len;
1362
1363 #ifdef PCSC_FUNCS
1364                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1365                     wpa_s->imsi[0]) {
1366                         imsi = wpa_s->imsi;
1367                         mnc_len = wpa_s->mnc_len;
1368                         goto compare;
1369                 }
1370 #endif /* PCSC_FUNCS */
1371 #ifdef CONFIG_EAP_PROXY
1372                 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1373                         imsi = wpa_s->imsi;
1374                         mnc_len = wpa_s->mnc_len;
1375                         goto compare;
1376                 }
1377 #endif /* CONFIG_EAP_PROXY */
1378
1379                 if (cred->imsi == NULL || !cred->imsi[0] ||
1380                     cred->milenage == NULL || !cred->milenage[0])
1381                         continue;
1382
1383                 sep = os_strchr(cred->imsi, '-');
1384                 if (sep == NULL ||
1385                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1386                         continue;
1387                 mnc_len = sep - cred->imsi - 3;
1388                 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1389                 sep++;
1390                 msin_len = os_strlen(cred->imsi);
1391                 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1392                         msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1393                 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1394                 imsi_buf[3 + mnc_len + msin_len] = '\0';
1395                 imsi = imsi_buf;
1396
1397 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1398         compare:
1399 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1400                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1401                            MACSTR, MAC2STR(bss->bssid));
1402                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1403                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1404                 if (ret) {
1405                         if (cred_excluded_ssid(cred, bss))
1406                                 continue;
1407                         if (selected == NULL ||
1408                             selected->priority < cred->priority)
1409                                 selected = cred;
1410                 }
1411         }
1412 #endif /* INTERWORKING_3GPP */
1413         return selected;
1414 }
1415
1416
1417 static struct wpa_cred * interworking_credentials_available_realm(
1418         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1419 {
1420         struct wpa_cred *cred, *selected = NULL;
1421         struct nai_realm *realm;
1422         u16 count, i;
1423
1424         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1425                 return NULL;
1426
1427         if (wpa_s->conf->cred == NULL)
1428                 return NULL;
1429
1430         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1431                    MACSTR, MAC2STR(bss->bssid));
1432         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1433         if (realm == NULL) {
1434                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1435                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1436                 return NULL;
1437         }
1438
1439         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1440                 if (cred->realm == NULL)
1441                         continue;
1442
1443                 for (i = 0; i < count; i++) {
1444                         if (!nai_realm_match(&realm[i], cred->realm))
1445                                 continue;
1446                         if (nai_realm_find_eap(cred, &realm[i])) {
1447                                 if (cred_excluded_ssid(cred, bss))
1448                                         continue;
1449                                 if (selected == NULL ||
1450                                     selected->priority < cred->priority)
1451                                         selected = cred;
1452                                 break;
1453                         }
1454                 }
1455         }
1456
1457         nai_realm_free(realm, count);
1458
1459         return selected;
1460 }
1461
1462
1463 static struct wpa_cred * interworking_credentials_available(
1464         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1465 {
1466         struct wpa_cred *cred, *cred2;
1467
1468         cred = interworking_credentials_available_realm(wpa_s, bss);
1469         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1470         if (cred && cred2 && cred2->priority >= cred->priority)
1471                 cred = cred2;
1472         if (!cred)
1473                 cred = cred2;
1474
1475         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1476                                                                       bss);
1477         if (cred && cred2 && cred2->priority >= cred->priority)
1478                 cred = cred2;
1479         if (!cred)
1480                 cred = cred2;
1481
1482         return cred;
1483 }
1484
1485
1486 static int domain_name_list_contains(struct wpabuf *domain_names,
1487                                      const char *domain)
1488 {
1489         const u8 *pos, *end;
1490         size_t len;
1491
1492         len = os_strlen(domain);
1493         pos = wpabuf_head(domain_names);
1494         end = pos + wpabuf_len(domain_names);
1495
1496         while (pos + 1 < end) {
1497                 if (pos + 1 + pos[0] > end)
1498                         break;
1499
1500                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1501                                   pos + 1, pos[0]);
1502                 if (pos[0] == len &&
1503                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1504                         return 1;
1505
1506                 pos += 1 + pos[0];
1507         }
1508
1509         return 0;
1510 }
1511
1512
1513 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
1514                               struct wpa_cred *cred,
1515                               struct wpabuf *domain_names)
1516 {
1517 #ifdef INTERWORKING_3GPP
1518         char nai[100], *realm;
1519
1520         char *imsi = NULL;
1521         int mnc_len = 0;
1522         if (cred->imsi)
1523                 imsi = cred->imsi;
1524 #ifdef CONFIG_PCSC
1525         else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1526                  wpa_s->scard && wpa_s->imsi[0]) {
1527                 imsi = wpa_s->imsi;
1528                 mnc_len = wpa_s->mnc_len;
1529         }
1530 #endif /* CONFIG_PCSC */
1531         if (domain_names &&
1532             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
1533                 realm = os_strchr(nai, '@');
1534                 if (realm)
1535                         realm++;
1536                 wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1537                            "with SIM/USIM domain %s", realm);
1538                 if (realm &&
1539                     domain_name_list_contains(domain_names, realm))
1540                         return 1;
1541         }
1542 #endif /* INTERWORKING_3GPP */
1543
1544         if (domain_names == NULL || cred->domain == NULL)
1545                 return 0;
1546
1547         wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1548                    "home SP FQDN %s", cred->domain);
1549         if (domain_name_list_contains(domain_names, cred->domain))
1550                 return 1;
1551
1552         return 0;
1553 }
1554
1555
1556 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1557                                 struct wpabuf *domain_names)
1558 {
1559         struct wpa_cred *cred;
1560
1561         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1562                 return -1;
1563
1564         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1565                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
1566                 if (res)
1567                         return res;
1568         }
1569
1570         return 0;
1571 }
1572
1573
1574 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1575 {
1576         struct wpa_bss *bss;
1577         struct wpa_ssid *ssid;
1578
1579         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1580                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1581                         if (wpas_network_disabled(wpa_s, ssid) ||
1582                             ssid->mode != WPAS_MODE_INFRA)
1583                                 continue;
1584                         if (ssid->ssid_len != bss->ssid_len ||
1585                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1586                             0)
1587                                 continue;
1588                         /*
1589                          * TODO: Consider more accurate matching of security
1590                          * configuration similarly to what is done in events.c
1591                          */
1592                         return 1;
1593                 }
1594         }
1595
1596         return 0;
1597 }
1598
1599
1600 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1601 {
1602         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1603         int selected_prio = -999999, selected_home_prio = -999999;
1604         unsigned int count = 0;
1605         const char *type;
1606         int res;
1607         struct wpa_cred *cred;
1608
1609         wpa_s->network_select = 0;
1610
1611         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1612                 cred = interworking_credentials_available(wpa_s, bss);
1613                 if (!cred)
1614                         continue;
1615                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1616                         /*
1617                          * We currently support only HS 2.0 networks and those
1618                          * are required to use WPA2-Enterprise.
1619                          */
1620                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1621                                    "with " MACSTR " but network does not use "
1622                                    "RSN", MAC2STR(bss->bssid));
1623                         continue;
1624                 }
1625                 count++;
1626                 res = interworking_home_sp(wpa_s, bss->anqp ?
1627                                            bss->anqp->domain_name : NULL);
1628                 if (res > 0)
1629                         type = "home";
1630                 else if (res == 0)
1631                         type = "roaming";
1632                 else
1633                         type = "unknown";
1634                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1635                         MAC2STR(bss->bssid), type);
1636                 if (wpa_s->auto_select ||
1637                     (wpa_s->conf->auto_interworking &&
1638                      wpa_s->auto_network_select)) {
1639                         if (selected == NULL ||
1640                             cred->priority > selected_prio) {
1641                                 selected = bss;
1642                                 selected_prio = cred->priority;
1643                         }
1644                         if (res > 0 &&
1645                             (selected_home == NULL ||
1646                              cred->priority > selected_home_prio)) {
1647                                 selected_home = bss;
1648                                 selected_home_prio = cred->priority;
1649                         }
1650                 }
1651         }
1652
1653         if (selected_home && selected_home != selected &&
1654             selected_home_prio >= selected_prio) {
1655                 /* Prefer network operated by the Home SP */
1656                 selected = selected_home;
1657         }
1658
1659         if (count == 0) {
1660                 /*
1661                  * No matching network was found based on configured
1662                  * credentials. Check whether any of the enabled network blocks
1663                  * have matching APs.
1664                  */
1665                 if (interworking_find_network_match(wpa_s)) {
1666                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1667                                    "match for enabled network configurations");
1668                         if (wpa_s->auto_select)
1669                                 interworking_reconnect(wpa_s);
1670                         return;
1671                 }
1672
1673                 if (wpa_s->auto_network_select) {
1674                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
1675                                    "scanning after ANQP fetch");
1676                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1677                                                 0);
1678                         return;
1679                 }
1680
1681                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1682                         "with matching credentials found");
1683         }
1684
1685         if (selected)
1686                 interworking_connect(wpa_s, selected);
1687 }
1688
1689
1690 static struct wpa_bss_anqp *
1691 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1692 {
1693         struct wpa_bss *other;
1694
1695         if (is_zero_ether_addr(bss->hessid))
1696                 return NULL; /* Cannot be in the same homegenous ESS */
1697
1698         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
1699                 if (other == bss)
1700                         continue;
1701                 if (other->anqp == NULL)
1702                         continue;
1703                 if (other->anqp->roaming_consortium == NULL &&
1704                     other->anqp->nai_realm == NULL &&
1705                     other->anqp->anqp_3gpp == NULL &&
1706                     other->anqp->domain_name == NULL)
1707                         continue;
1708                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
1709                         continue;
1710                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
1711                         continue;
1712                 if (bss->ssid_len != other->ssid_len ||
1713                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
1714                         continue;
1715
1716                 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
1717                            "already fetched BSSID " MACSTR " and " MACSTR,
1718                            MAC2STR(other->bssid), MAC2STR(bss->bssid));
1719                 other->anqp->users++;
1720                 return other->anqp;
1721         }
1722
1723         return NULL;
1724 }
1725
1726
1727 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1728 {
1729         struct wpa_bss *bss;
1730         int found = 0;
1731         const u8 *ie;
1732
1733         if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress)
1734                 return;
1735
1736         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1737                 if (!(bss->caps & IEEE80211_CAP_ESS))
1738                         continue;
1739                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1740                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1741                         continue; /* AP does not support Interworking */
1742
1743                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1744                         if (bss->anqp == NULL) {
1745                                 bss->anqp = interworking_match_anqp_info(wpa_s,
1746                                                                          bss);
1747                                 if (bss->anqp) {
1748                                         /* Shared data already fetched */
1749                                         continue;
1750                                 }
1751                                 bss->anqp = wpa_bss_anqp_alloc();
1752                                 if (bss->anqp == NULL)
1753                                         break;
1754                         }
1755                         found++;
1756                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1757                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1758                                 MACSTR, MAC2STR(bss->bssid));
1759                         interworking_anqp_send_req(wpa_s, bss);
1760                         break;
1761                 }
1762         }
1763
1764         if (found == 0) {
1765                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1766                 wpa_s->fetch_anqp_in_progress = 0;
1767                 if (wpa_s->network_select)
1768                         interworking_select_network(wpa_s);
1769         }
1770 }
1771
1772
1773 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1774 {
1775         struct wpa_bss *bss;
1776
1777         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1778                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1779
1780         wpa_s->fetch_anqp_in_progress = 1;
1781         interworking_next_anqp_fetch(wpa_s);
1782 }
1783
1784
1785 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1786 {
1787         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1788                 return 0;
1789
1790         wpa_s->network_select = 0;
1791         wpa_s->fetch_all_anqp = 1;
1792
1793         interworking_start_fetch_anqp(wpa_s);
1794
1795         return 0;
1796 }
1797
1798
1799 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1800 {
1801         if (!wpa_s->fetch_anqp_in_progress)
1802                 return;
1803
1804         wpa_s->fetch_anqp_in_progress = 0;
1805 }
1806
1807
1808 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1809                   u16 info_ids[], size_t num_ids)
1810 {
1811         struct wpabuf *buf;
1812         int ret = 0;
1813         int freq;
1814         struct wpa_bss *bss;
1815         int res;
1816
1817         freq = wpa_s->assoc_freq;
1818         bss = wpa_bss_get_bssid(wpa_s, dst);
1819         if (bss) {
1820                 wpa_bss_anqp_unshare_alloc(bss);
1821                 freq = bss->freq;
1822         }
1823         if (freq <= 0)
1824                 return -1;
1825
1826         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1827                    MAC2STR(dst), (unsigned int) num_ids);
1828
1829         buf = anqp_build_req(info_ids, num_ids, NULL);
1830         if (buf == NULL)
1831                 return -1;
1832
1833         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1834         if (res < 0) {
1835                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1836                 ret = -1;
1837         } else
1838                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1839                            "%u", res);
1840
1841         wpabuf_free(buf);
1842         return ret;
1843 }
1844
1845
1846 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1847                                             struct wpa_bss *bss, const u8 *sa,
1848                                             u16 info_id,
1849                                             const u8 *data, size_t slen)
1850 {
1851         const u8 *pos = data;
1852         struct wpa_bss_anqp *anqp = NULL;
1853 #ifdef CONFIG_HS20
1854         u8 type;
1855 #endif /* CONFIG_HS20 */
1856
1857         if (bss)
1858                 anqp = bss->anqp;
1859
1860         switch (info_id) {
1861         case ANQP_CAPABILITY_LIST:
1862                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1863                         " ANQP Capability list", MAC2STR(sa));
1864                 break;
1865         case ANQP_VENUE_NAME:
1866                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1867                         " Venue Name", MAC2STR(sa));
1868                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1869                 if (anqp) {
1870                         wpabuf_free(anqp->venue_name);
1871                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
1872                 }
1873                 break;
1874         case ANQP_NETWORK_AUTH_TYPE:
1875                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1876                         " Network Authentication Type information",
1877                         MAC2STR(sa));
1878                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1879                                   "Type", pos, slen);
1880                 if (anqp) {
1881                         wpabuf_free(anqp->network_auth_type);
1882                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
1883                 }
1884                 break;
1885         case ANQP_ROAMING_CONSORTIUM:
1886                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1887                         " Roaming Consortium list", MAC2STR(sa));
1888                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1889                                   pos, slen);
1890                 if (anqp) {
1891                         wpabuf_free(anqp->roaming_consortium);
1892                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
1893                 }
1894                 break;
1895         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1896                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1897                         " IP Address Type Availability information",
1898                         MAC2STR(sa));
1899                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1900                             pos, slen);
1901                 if (anqp) {
1902                         wpabuf_free(anqp->ip_addr_type_availability);
1903                         anqp->ip_addr_type_availability =
1904                                 wpabuf_alloc_copy(pos, slen);
1905                 }
1906                 break;
1907         case ANQP_NAI_REALM:
1908                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1909                         " NAI Realm list", MAC2STR(sa));
1910                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1911                 if (anqp) {
1912                         wpabuf_free(anqp->nai_realm);
1913                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
1914                 }
1915                 break;
1916         case ANQP_3GPP_CELLULAR_NETWORK:
1917                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1918                         " 3GPP Cellular Network information", MAC2STR(sa));
1919                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1920                                   pos, slen);
1921                 if (anqp) {
1922                         wpabuf_free(anqp->anqp_3gpp);
1923                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1924                 }
1925                 break;
1926         case ANQP_DOMAIN_NAME:
1927                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1928                         " Domain Name list", MAC2STR(sa));
1929                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1930                 if (anqp) {
1931                         wpabuf_free(anqp->domain_name);
1932                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
1933                 }
1934                 break;
1935         case ANQP_VENDOR_SPECIFIC:
1936                 if (slen < 3)
1937                         return;
1938
1939                 switch (WPA_GET_BE24(pos)) {
1940 #ifdef CONFIG_HS20
1941                 case OUI_WFA:
1942                         pos += 3;
1943                         slen -= 3;
1944
1945                         if (slen < 1)
1946                                 return;
1947                         type = *pos++;
1948                         slen--;
1949
1950                         switch (type) {
1951                         case HS20_ANQP_OUI_TYPE:
1952                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
1953                                                              slen);
1954                                 break;
1955                         default:
1956                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
1957                                            "vendor type %u", type);
1958                                 break;
1959                         }
1960                         break;
1961 #endif /* CONFIG_HS20 */
1962                 default:
1963                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
1964                                    "vendor-specific ANQP OUI %06x",
1965                                    WPA_GET_BE24(pos));
1966                         return;
1967                 }
1968                 break;
1969         default:
1970                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
1971                            "%u", info_id);
1972                 break;
1973         }
1974 }
1975
1976
1977 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
1978                   enum gas_query_result result,
1979                   const struct wpabuf *adv_proto,
1980                   const struct wpabuf *resp, u16 status_code)
1981 {
1982         struct wpa_supplicant *wpa_s = ctx;
1983         const u8 *pos;
1984         const u8 *end;
1985         u16 info_id;
1986         u16 slen;
1987         struct wpa_bss *bss = NULL, *tmp;
1988
1989         if (result != GAS_QUERY_SUCCESS)
1990                 return;
1991
1992         pos = wpabuf_head(adv_proto);
1993         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
1994             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
1995                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
1996                            "Protocol in response");
1997                 return;
1998         }
1999
2000         /*
2001          * If possible, select the BSS entry based on which BSS entry was used
2002          * for the request. This can help in cases where multiple BSS entries
2003          * may exist for the same AP.
2004          */
2005         dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2006                 if (tmp == wpa_s->interworking_gas_bss &&
2007                     os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2008                         bss = tmp;
2009                         break;
2010                 }
2011         }
2012         if (bss == NULL)
2013                 bss = wpa_bss_get_bssid(wpa_s, dst);
2014
2015         pos = wpabuf_head(resp);
2016         end = pos + wpabuf_len(resp);
2017
2018         while (pos < end) {
2019                 if (pos + 4 > end) {
2020                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
2021                         break;
2022                 }
2023                 info_id = WPA_GET_LE16(pos);
2024                 pos += 2;
2025                 slen = WPA_GET_LE16(pos);
2026                 pos += 2;
2027                 if (pos + slen > end) {
2028                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
2029                                    "for Info ID %u", info_id);
2030                         break;
2031                 }
2032                 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
2033                                                 slen);
2034                 pos += slen;
2035         }
2036 }
2037
2038
2039 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
2040                                           struct wpa_scan_results *scan_res)
2041 {
2042         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
2043                    "ANQP fetch");
2044         interworking_start_fetch_anqp(wpa_s);
2045 }
2046
2047
2048 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
2049 {
2050         interworking_stop_fetch_anqp(wpa_s);
2051         wpa_s->network_select = 1;
2052         wpa_s->auto_network_select = 0;
2053         wpa_s->auto_select = !!auto_select;
2054         wpa_s->fetch_all_anqp = 0;
2055         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
2056                    "selection");
2057         wpa_s->scan_res_handler = interworking_scan_res_handler;
2058         wpa_s->scan_req = MANUAL_SCAN_REQ;
2059         wpa_supplicant_req_scan(wpa_s, 0, 0);
2060
2061         return 0;
2062 }
2063
2064
2065 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
2066                         enum gas_query_result result,
2067                         const struct wpabuf *adv_proto,
2068                         const struct wpabuf *resp, u16 status_code)
2069 {
2070         struct wpa_supplicant *wpa_s = ctx;
2071
2072         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
2073                 " dialog_token=%d status_code=%d resp_len=%d",
2074                 MAC2STR(addr), dialog_token, status_code,
2075                 resp ? (int) wpabuf_len(resp) : -1);
2076         if (!resp)
2077                 return;
2078
2079         wpabuf_free(wpa_s->last_gas_resp);
2080         wpa_s->last_gas_resp = wpabuf_dup(resp);
2081         if (wpa_s->last_gas_resp == NULL)
2082                 return;
2083         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
2084         wpa_s->last_gas_dialog_token = dialog_token;
2085 }
2086
2087
2088 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
2089                      const struct wpabuf *adv_proto,
2090                      const struct wpabuf *query)
2091 {
2092         struct wpabuf *buf;
2093         int ret = 0;
2094         int freq;
2095         struct wpa_bss *bss;
2096         int res;
2097         size_t len;
2098         u8 query_resp_len_limit = 0, pame_bi = 0;
2099
2100         freq = wpa_s->assoc_freq;
2101         bss = wpa_bss_get_bssid(wpa_s, dst);
2102         if (bss)
2103                 freq = bss->freq;
2104         if (freq <= 0)
2105                 return -1;
2106
2107         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
2108                    MAC2STR(dst), freq);
2109         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
2110         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
2111
2112         len = 3 + wpabuf_len(adv_proto) + 2;
2113         if (query)
2114                 len += wpabuf_len(query);
2115         buf = gas_build_initial_req(0, len);
2116         if (buf == NULL)
2117                 return -1;
2118
2119         /* Advertisement Protocol IE */
2120         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
2121         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
2122         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
2123                       (pame_bi ? 0x80 : 0));
2124         wpabuf_put_buf(buf, adv_proto);
2125
2126         /* GAS Query */
2127         if (query) {
2128                 wpabuf_put_le16(buf, wpabuf_len(query));
2129                 wpabuf_put_buf(buf, query);
2130         } else
2131                 wpabuf_put_le16(buf, 0);
2132
2133         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
2134         if (res < 0) {
2135                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
2136                 ret = -1;
2137         } else
2138                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
2139                            "%u", res);
2140
2141         wpabuf_free(buf);
2142         return ret;
2143 }